Automobile door locking system and mechanism



E. 1:). DALL June 1939.

AUTOMOBILE noon LOCKING SYSTEM AND MECHANISM Filed'Mrch 27, 1937 2 Sheets-Sheet l VIDWABO' .0. DA.

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June 20, 1939.

E. D. DALL AUTOMOBILE DOOR LOCKING SYSTEM AND MECHANISM Filed March 27, 1937 2' Sheets-Sheet 2 I VE' T fbwmeo 0. LDALL.

Patented June 20, "19 39 umre st-Ares;

AUTOMOBILE noon Loco srs'raiu Ann Maonsar zinger rains Edward D. Dali, Wauhegan, EL, ignor to Walter I F. Wright, Shaker Heights,- Cleveland, Ohio Application March a, 1937, Serial No. 133,352

, "3 Claims. My invention relates to locking structure for 'controlling the locking of automotive vehicle doors and may be readily incorporated in locking-controlling'systems such as disclosed in my copending application Serial No. 655,180, filed February 4, 1933, now matured into Patent No. 2,102,997, dated Dec. 21, 1937, or in my copending application Serial No. 716,306, filed March 19,1934. The invention may also be considered as an improvement over and addition to the locking controlling system and structure disclosed in my copending application Serial No.

' 66,149, filed February 28, 1936.

. In these various locking systems referred to, looking or unlocking of all of the doors of a vehicle iscontrolled by manipulation 'of a mas-- ter lock usually located on the front right door of the vehicle. The system is locked by manipulation of the outer door handle associated with the master lock and the system may be unlocked from the outside by means ofv a key. Looking for the driver to leave by the left front door while.

' side by manipulation of the and unlocking of the system from the. inside of the vehicle-is accomplished by manipulation of the inside Handle mechanism associated with the master lock. In the systemdisclosed in my copending application Serial No. 66,149, any of the vehicle doors, after locking of the system, may be opened by manipulation of the inside handle mechanism on the doorsbut after a door has been opened and slammed shut the door will remain unlocked. Should the driver unlock the system by means of the inside handle mechanism at the master lock, and step, out of, the vehicle, he can reloci; the sysem from the-out master lock. Many'times it is more convenient the system is locked, and in the system in the .copending application referred to hedoes this.

by operating the inside handle of the left front door, but after opening of the door and slainrning it shut, the door will be unlocked, while the other doors will remain locked. It may however be desirable to reloclr thisleft front door, and one important object the invention is to provide means, preferably keycontrolled, for re-" locking oi this door.

' A-further object of the invention is .to L provide an arrangementwhereby the driver may leave a locked car either by the front right door or the front left door, reloclr the car from the dooi' through which he left, and then reenter the car:

through either of said doors. v

=1A.-iurther-oloiect is to provide jsimple means uter handle of the for accomplishing the above referred to opera-'- tionand procedure.

The various features of my invention ail-e shown incorporated in the structure disclosed on the drawings, in which drawings:

Figure 1 is an outer side elevation of the master lock and the inside handle mechanism associated therewith;

Figure 2 is an outside elevation of a remote door lock for cooperation with and controlled by the master lock of Figure 1; s I I Figure 3 is a longitudinal section through a spindle lock associated with the door handle;

, Figure 4 is a side elevation of the roll-back V actuating-cam member in the loci; of Figure 1;

Figure 5 is a side elevation of the roll-back member of the lock of Figure 1;

ture shown imFigure 1 comprises a supportingplate i having the outer flange 2 thereon provided with the opening 3 for passage of the beveled latch bolt head l secured to the plate E5 slidable on the supporting plate l and guided by a post 5 extending from the supporting plate through the longitudinal slot 1 in the latch plate. A spring 6 engaging against the inner side oi the supporting plate 1.

Belo the latch structure and adjacent to the flange 2*, a cover plate H is spaced a. distance from but secured to the supporting plate, the

' the latch bolt head tends to hold the latch bolt structure in its outer or latching msltion. latch plate at its inner end is widened and has rearwardly projecting guide flanges 9 and it engagin The roll-back member i5 and the roll-back actuating cam member 16 being aligned in this space. The cam memberhas the rectangular axial passage ii for receiving the rectangular end 15 of the spindle it extending ircrn the outer door handle 2% (Fig.3) while the roll-back member has a cylindrical passage 2| for receiving the spindle it, the cam member having a radial shoulder 22 for cooperation with an abutment lug 23 on the roll-back member.

Slidable and swingable on the supporting wall I below the latch bolt structure .is a retractor 30 tionits inner end will be in front of the lower flange I of the latch bolt plate a so that the bar may communicate the rotation of the rollback member to the plate for retraction of the latch' bolt structure. The roll-back member 5 is rotated in clockwise direction when the handle dilis rotated in the same direction, as the shoulder' 22' on the cam member it then engages with the lug 23 on the roll-back member.

inwardly of the roll-back member and the cam member a pin 2@ is journalled in the wall 6 and the cover plate ii and carries a cam leverfit on which is mounted a cam pin' 39 for engaging with the underside of the retractor bar 2% when the lever 29 is turned in clockwise direction, such 5 turning being efiected by engagement with the lever 29 of the cam tooth 22' on the roll-back cam it whenthe cam is turned in counterclockwise direction by the handle spindle 89. Upon said turning of the cam lever, the pin it will cause an the retractor bar to be swung upwardly a sumcient distance to carry its inner end above the latch bolt flange it so as to free the retractor bar from the latch bolt structure and to prevent retraction of the latch bolt structure when the 5 retractor bar is shifted inwardly by clockwise turning of the roll back member. A spring 3i mounted on the supporting wall 6 engages with I its end against apush rod 3i which red at its lower end abuts the shoulder 32 and tends to hold this bar down in its normal position against the stop projection 33 on the plate 0.

In front of the cam lever 29, a locking lever iltis pivoted on a post 35 extending from the supporting plate 9, this locking lever having a 5 projection 35' from its outer upper corner in the "path oi a pawl 36 transversely slidable in the spindle it of the handle 20, the pawl receiving the eccentric pin 3? at the end of the shaft 8%] within the spindle terminating at its outer end 59 in a lock frame 3b in which a lock cylinder (not shown) is turnable by a suitable key til (Fig; '3) When the key is turned, the pawl 36 will be shifted vertically either upwardly'or downwardly and when shifted upwardly it will engage with 5 the projection 35' to hold the locking lever 33 in its upper position as shown in full lines on Figure 1'. The locking lever has the stop shoulder M for cooperating with an abutment pin or projection 02 on the lower end of the cam lever 29.

Figure. 1 shows the lock structure in unlocked condition, the pawl as being in its upper position to hold the locking lever raised. When it is desiredto lock the latch'bolt structure aaglnst rev traction by the retractor bar 2t, the key is turned 5 to shift the pawl 36 downwardly to release the locking lever so that the spring (it may swing the locking lever downwardly, against the abutment pin 42 on the cam lever. The handle 26 is then turned a short distance in counterclockwise direction for engagement of the cam member 88 with the cam lever for clockwise rotation of the cam lever and upward swing of the retractor bar to-its locking position that is, to a'positi'on which frees it from the latch bolt structure. As the cam lever is turned, the abutment pin is glides past the locking lever 36 and the locking lever then is swung downwardly with its shoulder 4i behind the abutment pinto thereby lock the cam lever in said position and to hold the retractor bar in looking position. The latch bolt structure cannot be re- 5- key is turned to shift the pawl 3t upwardly for upward swing of the locking lever 36 and with- .drawal thereof from the cam lever abutment t2,

the spring M then returning the retractor bar to 315 normal or unlocking position, the downward swing of the retractor bar by its engagement with the cam pin 35 causing the cam lever 29 to be swung back to its normal position. Now upon turning of the outer'handle in clockwise direction, the roll-back member itwill shift the retractor bar inwardly against the abutment flange it and the latch bolt structure will be retracted.

Besides controlling the retraction of the latch bolt'inthe master lock (Figure l), the cam lever 29 functions to prevent or permit operation of the latch bolt in remote looks, that is, locks onthe other-doors of the vehicle, as for example, the locks shown in Figure 2. Below the locking lever 36, a plate t lis slidable on the supporting plate i, being guided by a post 35 extending from the supporting-plate fl through the longitudinal slot M in the plate M. The plate Mi at its outer end carries a pin t? which projects through a spring tending to normally hold the plate shifted inwardly with the outer edge of the guide slot t6 abutting the post {55. When the outer handle 2b of the lock is turned in counterclockwise direction to swing the cam lever for release of the retractor bar 20 from the latch bolt structure, the lever 29 at its lower end abuts against the inner end of the pin li and the pin and plate are shifted outwardly. As will be explained more in detail later, such outward shift of the pin ii, acting through transmission mechanism provided in the stiles'or posts between adjacent doors, will cause inward movementof the pins in the remote locks for swing of the retractor bars in such remote locks away from .the latch bolt structure therein so that at such remote locksthe latch bolt structure cannot be retracted by turning of the outer handle' When the locking lever 36 is in its lower position it will engage behind the cam lever abutment 52 after swing of this lever for outward shift of the pin ti, and the master lock and the remote locks wili have theirretractor bars held in looking position. When the key is turned at the mass ter loci; to shift the pawl 36 upwardly, the looking lever 34 is released from the cam lever and the plate 44 is shifted inwardly by the spring 439 and the master lock and the remote locks can algainbe opened from theexterior.

For controlling the latch bolt operation from the inside of the door on which the lochstructure is applied, a supporting plate 58 is secured to the door inwardly of the latch bolt supporting structure and another plate 58 is spaced from and secured to the plate 5a.. These plates journal the shank E2 of aninner door handle 53 and v the shank between the plate, carries an arm. at 75 ill ' tion of the inner handle the head 56' will abut the handle 2d.

connected by link 55 with the latch bolt plate 5, the connection being by means of a pin on the link engaging in the longitudinal slot 5'! in the plate 5. When the handle 53is swung in clockwise direction, the resulting pull on the link by the arm it will shift the latch bolt plate 5 inwardly for retraction of the latch bolt head 5. When the inner handle is in neutral posl-' tion, the pin and slot connections 56-5! will" permit retraction of the latch bolt structure by the outer handle so. c

When the inner handle is swung at distance in counter-clockwise direction, the lock bolt structure will be locked against retraction by the outer door handle and at the same time the pin $1 will be shifted outwardly for locking of the remote lock latch bolts against retraction by their outer handles. This is accomplished by means of a slide plate 58 guided for-longitudinal inward and outward movement on the wall l by the post 5% of the wall I engaging in the slot 5% in the slide plate, and also by the pin 35 engaging in the slot 60. The slide plate at its inner end has the upward extension Si in the l path of the head 56' on the pin 56 so that when the link 55 is pushed by counterclockwise rota the extension 5i and the slide plate 58 will be shitted outwardly to carry its end 62 into position below the tooth 22' on the roll-back actuating cam it so that the cam member will be dogged against rotation thereof and consequently rotation of the roll-back l5, and the roll-back cam will beprevented from rotation by the outer handle ill and therefore the latch bolt cannot be retracted. Also during outward movement of the slide plate 58, a shoulder 63 thereon engages with the inner end of the pin plate 44 and this plate will be shifted outwardly for outward pro ection of the pin 61 and consequent locking of he latch bolt of the remote locks against retraction by their outer handles.

Ordinarily, before the inside handle'mechanism on the master lock, Figure 1, is operated for locking of this lock and the remote locks, the key actuated pawl- 36 will be in its upper position for holding the locking lever 34 up, and the cam lever 29 is in its normal positionand the retractor bar 2d is in its unlocking position. With the pawl 36 in such upper position, rotation of the outside handle in a counterclockwise direction will be prevented by the engagement of the upper end of the pawl with a stop 64 whiclr may be formed on the cover plate H and therefore the system cannot be locked by turning of If, after locking of the system by operation of the inside handle 53, it is desired to unlock the system from the outside, the key 49' is inserted and turned to shift the pawl 36 downwardly to release the outer handle for counterclockwise, rotation. Upon such counterclockwise rotation, an arm 65 on the roll-back actuatingcam member i6 will engage with the forward projection 62' on the end 62 of the dogging plate 58 and this plate will be shifted inwardly to withdraw its end from below the tooth 22' of the cam member so that the cam member will again be free for clockwise rotation by the outer handle. 1

when the pawl 36 is shifted downwardly, the locking lever 34 is released and swung downwardly against the abutment pin 42. Then when the cam member i6 is rotated for shifting back the dogging plate 58, the spring 49 tends to shift. back the plate 44 and the pin 41, but .at the same time the lever 29 is rotated by the com the pin 51 is held out and the tooth 22' and retractor bar 24 is raised. However, when the handle is returned to its, normal position and the cam lever 29 is released, the spring 49 and the spring 3i respectively become effective to shift the plate 65 and pin 41 back to unlocking position and to swing the retractor bar 24 back to unlocking position and the master lock and the remote locks will then be unlocked.

The inside handle mechanism is normally held in a neutral position by a spring 6% reinforced by aspring til, the spring 66 normallyengaging in the detent notch 58 on the hub of the lever 54. When the handle mechanism hasbeen actuated in counterclockwise direction for locking the locks, the spring at will engage in the detent notch 69.

At its inner end the locking lever '34 has an upwardly extending cam tail l0 whose upper When the roll-back cam member it is rotated by counterclockwise turning oi the cam edge I! is in alignment with the lower edge of a cam projection E2 on the latch bolt plate 5- outwardly of the cam edge when the master lock is in unlocked condition as shown on Figure 1. The latch bolt can nowj be withdrawn for openlog of the door by clockwise rotation of the inside handle 53. If the system has been locked from the master door by shifting down of the pawl 36 and counterclockwise rotation of the cam member it, and the locking lever 34 has been swung down, the cam edge H will be in the path of the cam extension i2. Now when the inside handle 53 is rotated in clockwise direction andthe latch bolt is retracted. the engagement of the cam projection with the cam edge will swing the locking lever 34 for release'of the cam lever 29 and return of the locking pin 81 and the retracto'r bar 24 of the master, lock to unlocking position and the consequent unlocking of the latch bolts on the ot or or. remote doors, The locking lever 34 is thus perable for unlocking of the system from the outside by shifting down the pawl 36 by operation of the key so, or from the inside by rotation of the inner handle 53 in clockwise direction. I

On Figure 2 is shown the lock structure slightly modified for service on the remote vehicle doors, that is, the doors other than the door on which the master lock is applied. The structuralparts of the lock of Figure 2 which are the same as the structural parts of Figure l have been given the I I same reference numerals. In the structure of the remote lock, the roll-back cam element of Figure 1 has-been omitted and only a roll-back member i3 is provided whose arm 113' the outer end of the retrator bar 23, the rollis in alignment with back being mounted on the polygonal end I4 of the spindle I5 of the door outer handle, so that when the outer handle is turned in clockwise direction the roll-back will be directly operated for shift of the retractor bar. Locking of the latch bolt structure'agalnst retraction bythe outer handle is accomplished by freeing the retractor bar from the latch bolt, such movement,- resulting frominward shift-of the pin 41' on the plate 44, 4

such inwardshift being, "as has already been explained, caused by the outward movement of the .pin 41 in the master lo'ck byway of transmission mechanism within the post or stile between adjacent doors.

In the remote looks a lever. plate 18 is provided and pivoted on. a pin Tl journalled in the supporting wall I and the cover plate ll. At its inner end this lever has the abutment extension 18 for-engaging with the under edge of the retension 82 deflected from the plate 44 from which the finger 81' extends.

force of the spring as, and in such position the abutment 82 is against the finger 8i to hold the lever 18 down for release of the retractor bar which thenseats against the rest projection 88 on the plate 0, and when-the outer handle is now turned in clockwise direction the retractorbar will engage with the latch bolt structure for retraction thereof. However, should the pin Ql' be shifted inwardly, the abutment 82 on the plate 44 will engage with the cam edge 88 and-the. lever 16 will b swung upwardly for engagement of its abutment 18 with the retractor bar to swing the retractor bar to locking position, that is, free from the latch bolt structure so that when the door handle is thenturned the retractor bar will merely shift longitudinally but will not retract the latch bolt. Upon release of the pin 8l','the spring The transmission of the movementfof the.

master lock pin ll to the pins 81' of the remote locks is shown on Figure .6. At the sides of the post or stile 83 between adjacent doors, levers 8t and 84' are pivoted at their outer ends by.pins

85 for horizontal swing, a transmission bar 88 slldable on the rear wall of the stile being interposed between the ends of the levers'. The lever 84 is in alignment with the pin 47 of the master,

lock structure and the lever 84' is in alignment with the pin 81' of the lock on the cent door so that when the pin 47 is shifted out ardly the pin 67' will be shifted inwardly for locki g of the respective latch bolts against unlatching movement by the respective door outer. handles.

The movement of the transmission lever 88 controlled by the master lock pin 41 may be communicated to a suitable lever 81 pivoted at 88 to the stile 83 and the movement of the lever is transmitted by a cable 88 to transmission means between the adjacent doors on the opposite side of the vehicle so that all the remote'door locks may be controlled by operation of the master lock in a manner "such as is disclosed in my copending applications referred to herein.

Referring again to Figure 2, the lever plate 18 has at its upper end a forwardly oflset extension or 88 in the path of a cam hump 8| "on the late bolt plate 8 normally a distance in advance,

The lever plate ll isloosely mounted on the pin 'I'I for slight forward" and porting plate,v A flat spring 82 held on the pin 'l'l tends to hold of the arm 88.

rearward swingrelatlve to the sup the plate 18 with its abutment projection 18 below the retractor bar 24 so that when the lever plate is swung upwardly it will raise the retractor bar and hold it in locking position. when the latch bolt is then retracted either by operation of the inside handle or by slamming of the door. the cam hump 8| will engage the arm 88 and the lever plate will be swung forwardly towithdraw its abutment 18 from underneath the retractor bar 24 so that this bar may swing "back to unlocking position, The structure thusfar recited in connection with fthelock on Figure 2 has the same operation as the remote lock structure on Figure 4 in my copending application Serial No. 66,148 filed February 28, 1836, the purpose of the lever extension 88 and the cam hump 8|. being to p're vent a remote door from being relocked after it has been opened by operation of the inside handle and then slammed shut by a personv leaving through the door.

oftentimes it is more convenient for the driver of a car to leave the car through the left front door. With the arrangement thus far described in connection with Figure 2, if, after the driver has locked the doors by operation of the inside handle of the right front door, he unlatches the left front door by operation of its inside handle andthen leaves through this door and slams the door closed the door will become unlocked while the other doors will remain locked. It may be desired to lock the left front door from the outside and also to be able tore-enter the car by either the front left or the front right door whether the system has been locked from the inside or outside at the master door. To adapt the left front door for relocking after leaving therethrough and for permitting re-entry through this door, additional mechanism is provided as shown on Figure 2.; Such additional mechanism comprises structure controllable by key means sinnlar to that shown on Figure 3.- In the spindle It of the outer handle 82 (Figure 7) is the pawl 88 shiftable in the transverse channel 86', and this pawlisnormally yieldingly held with its end flush with the outer surface of the spindle by means of a spring 88 arranged in the well known manner as shown by Figure 7. The shiftable pawl 88 cooperates'with the upper and lower arms 88 and 81 of a lever 88 secured to the pin H, and this pin has also secured thereto a cam arm 88 extending inwardly below the lever plate l8 and in the plane'of the retractor bar 24 so that when the cam arm is swung in counterclockwise direction by downward shift of the pawl 88, the cam arm will raise the retractor bar to its locking position with its end ab'ove'the flange l8 on thelatch bolt plate 5, and when the pawl 88 is shifted upwardly the lever 88 .will be returned for release of the retractor bar and movement thereof back to the unlocking position shown on Figure 2.

The lever plate 16 has a portionthereof deflected rearwardly to provide a cam hump I88 in the path of the cam arm 88. During certain conditions of operation, as will be described more in detail later, the cam arm 88, during clockwise swing thereof. will engage the cam hump I88 to swing the lever plate 18 forwardly for release of its projection '18 from the retractor bar so that .tion.

Describing now the operation of the system, Figure 1 shows the master lock on the right front door in unlockingposition and Figure 2- shows the lock on the left front door in unlocked condition. If the system is to be lockedirom the outside of the vehicle, the key of the master lock is inserted and turned to shift the pawl down to release the locking lever 33 and then the outer door handle is rotated in counterolockwiseditection for movement of the master lock retractor bar 2% to locking positionand for outward shift of the pin il, outward shift of the pin ll acting through the transmission structure in the' stiles, and inward shift of the pin ill of theremote locks. Referring to Figure 2, inward shift'of the pin di swings the lever it up for engagement of its abutment it with the retractor bar to swing the bar up to locking position. if the driver desires to enter by the right front door, lie-inserts and operates the key to shift the pawl 3d of the master lock upwardly thus withdrawing the locking lever M for release of the pin ii and consequent release of all the pins 61' at the remote locks and swing of the retractor bars back to unlooking position. After the driver has entered the car, he may lock the entire system'by rotation of the inner'handle 55 in counterclockwise direction which results in clogging of the roll-back in the master lock and outward shift of the pin ll with the consequent inward shift of thepins 617' at the remote locks for'putting such locks in locked condition. 5,

if the driver wants to leave by way of the right front door, he swings the inside handle pf that door for retraction of the dogging plate is and undogging of the rollback for unlocking of the master lock, and the spring 69 withdraws the pin plate dd and pin M for release of the pins 3'! at the remote locks and consequent unlocking of these locks.

If the driver, after having locked the system from the inside of the car by manipulation of the inside handle associated with the mas r lock,

them desires to leave by the left front joor, he

first operates the inside handle on the left front door to retract the latch bolt and then swings the door open. when the driver unlatches the left front door from the inside, the retractor bar on the left front door lock, which is then in looking pgsition, will be released by the engagement of cum hump M with the arm as on the raised lever 16, this cam engagement swinging the lever forward; iy to withdraw the abutment 18 from below the retractor bar. As the door isnow swung open after unlatching, the lever I6 is released from the cam hump and swings back with, its abutment id'against the swung down retractor bar.

However, when the door is swung open, {the pin til will be released from the transmissiontnechanism in the adjacent stile, and the plate'dd and pin ti are shifted outwardly for downward swing of the lever it whereupon this lever is' swung rearwardiy by the spring 92 to set its abutment is below the swung down retractor bar 24. Now when the door is slammed shut, and the pin 61' is again cammed in. by the corresponding I lever 34' in the stile, the lever II will be swung upwardly to raise the retractor bar 24 tolocklng position but, when the door is slammedshut, the latch bolt will also be shifted'inwardly by engagement thereof with the stile keeper and the cam hump ti on the latch bolt will again engage the All of the doors having been locked extension of the lever I6 and will swing this lever forwardlyto release the retractor bar which left front door is unlocked while all of the other doors remain locked. f

When the left front door, after slamming shut,

"then drops back to unlocking position, and the is in' unlocked condition, the raised lever 18 is held with its abutment i8 against the front face of the retractor bar, by force of the spring 92.

, If the driver should desire to lock theleft front door, he inserts and-turns the key for downward shift of the pawl 93 and counterclockwise swing of the lever as and of the cam arm 99, the cam l edge of the retractor bar and the lock is then in locked condition and the entire car is locked. Should the driver now desire to re-enter by the left front door he inserts and operates the key to shift the lock pawl t3 upwardly for downward swing of the arm es, such downward swing causing the arm to engage the cam hump led onthe lever in to swing this lever forwardly for withdrawal of the abutment 18 from underneaththe retractor baifiso that the bar may swing'back to unlocking position, the door being then unlocked. Before opening the door, the driver withdraws the key from the look so that the spring 96 (Fig. '7) may restoreithe pawl 93 to neutral position. The outer door handle is then turned for retractionof the latch bolt, and'when the latch bolt is retracted the hump 9| has no effect on the lever l6 as this lever is already in its forward]? swung position with its abutment 18 in front of the retractorbar; When the door is now swung open and the pin 4'! is released forwardly to release the retractor bar which then drops down to unlocking front door is relock the left front door from the inside of the car, the driver first manipulates the inside handle at the master lock in unlocking direction so that the pins-81' of the left front door lock and the other remote locks may shift outwardly. At the left front door lock,- the lever 16 will then be position so that the leftthen in unlocked condition. To

swung downwardly so it my swing rearwardly for relocating of its abutment .18 below the retractor bar, and then by manipulation of the inside handle at the master lock all of the doors may be relocked.

After the left front door is unlocked and opened from the outside, and is then slammed shut from the inside, and the lever it was swung forwardly by the cam hump 9 I the retractor bar which was swung down to unlocking position by the force of the spring 3i, engages the arm'99 and swings this arm and the lever flt'back to the normal position shown on Figure 2 If, after looking all the doors from the inside, the driver'leaves by the left front door and relocks this door, andgtdesires to re-enter by the right front door, he inserts and operates the key at the right front door to shift the pawl 36 down- W wardly to release the pawl from the stop 64, and he then turns the outer handle in counterclockwise direction to shift back the plate 58 and then when the handle is swung back to normal p'osition all the locks will be unlocked and clockwise rotation of the handle will then unlatch the right front door so that the driver may enter. The system can then be relocked by manipulation of the inner handle for the master lock.

If all the doors are unlocked and the driver lea es by the right front door, he may lock the system byshifting the pawl 36 down by means of the key and then turning the outer door handle counterclockwise for operation of the cam lever '29, all the doors being then locked. To re-enter through the right front door,-he inserts and operates the key to shift the pawl 36 upwardly for release of the locking lever 34 from the cam lever 29 and all of the doors will then become unlocked.

If the system has been locked from the outside at the right front door by downward shift of the pawl 36 and counterclockwise rotation of the outside handle, and the driver enters the vehicle at the left front door by means of the key for that door, he can unlock the system from the inside by operation of the inside handle for the right front door to retract the latch bolt of that door, such retraction engaging the cam projection I2 on the latch bolt with the cam edge H on the locking lever 34 to rotate this locking lever for release of the cam lever 29 and consequent unlocking of the locked doors.

I-have shown practical and efiicient embodiment of the various features of my invention but I do not desire'to be limited to the exact construction, arrangement and operation shown and described as changes and modifications may be made without departing from the scope of the invention.

I claim as follows:

1. In a door, means for holding said door closed,

means on the exterior of said door movable in one direction to release said holding means,

means operable from the interior of said,door.

to lock and unlock it, means operable by the exterior door means in the opposite direction for operating said interior means to unlock said door, and means for locking said exterior door means against operation in said opposite direction.

v2. In a door, means for holding said door closed, means on the exterior of said door movable in one direction to release said holding means, means operable from the interior of said door to lock and unlock it, means operable by the exterior door means in the opposite direction for 5 to unlock said door, and other means operable by such reverse movement of said exterior door means for locking said holding means against release by subsequent forward movement of said exterior means.

EDWARD D. DALL.

release thereof for operating. said interior means 

